Website-to-Android Feature Port

I need my existing website turned into a polished native Android app that mirrors all of our key workflows. The must-haves are secure user authentication (with OTP verification), a browsable product catalog, smooth order processing and a fully integrated payment gateway... (Budget: ₹1500 - ₹12500 INR, Jobs: Android, Android App Development, Android Studio, API Integration, Java, Kotlin, Mobile App Development, PHP)